Question

我有一个接受字符串的函数，并根据该字符串生成电子邮件附件。它适用于html页面，文本文档等，但我不能让它生成PDF文件。

代码：

Public Sub SendMail _
( _
ByVal strFrom As String _
, ByVal strTo As String _
 , ByVal strSubject As String, ByVal strBody As String _
 , Optional ByVal attachment As String = "" _
 , Optional ByVal filename As String = "Attachment.HTML" _
)

    Dim sendMail As New SmtpClient
    Dim mail As New MailMessage(strFrom, strTo)
    Dim userToken As New Object


        mail.Subject = strSubject
        mail.Body = strBody

        mail.IsBodyHtml = True


        Using MemoryStream = New MemoryStream

            If attachment.Length <> 0 Then
                        Dim data As Byte() = Encoding.ASCII.GetBytes(attachment)
                        MemoryStream.Write(data, 0, data.Length)
                        MemoryStream.Seek(0, SeekOrigin.Begin)
                        MemoryStream.Position = 0

                        Dim content As New ContentType()
                        content.MediaType = MediaTypeNames.Application.Octet
                        content.Name = filename

                        Dim newAttach As New Attachment(MemoryStream, content)
                        mail.Attachments.Add(newAttach)
            End If


            sendMail.DeliveryMethod = SmtpDeliveryMethod.Network
            sendMail.Host = "SERVER"
            sendMail.UseDefaultCredentials = False
            sendMail.Credentials = New System.Net.NetworkCredential("UN", "PW")

            sendMail.Send(mail)


        End Using

如果我将文件附件保存为Whatever.PDF，则会收到错误消息，表明它未正确编码。不知道我需要做些什么来使用PDF，尝试搜索谷歌但没有找到任何帮助我。

EDITED ：

我正在使用datadynamics活动报告PDF导出器来生成PDF

dim pdf as new datadynamics.activereports.export.pdf.pdfexport
sendmail("from@", "to@", "test", "test", pdf.tostring, "pdf.pdf")

我认为问题在于我将PDF转换为字符串，然后尝试将其转换回PDF并将其附加到电子邮件中，但我并非百分百确定。

感谢。

Answer 1

我不熟悉这种报告技术，但根据documentation你应该使用这样的东西：

DataDynamics.ActiveReports.Export.Pdf.PdfExport p = new DataDynamics.ActiveReports.Export.Pdf.PdfExport();
string tmp = Path.GetTempFileName();
p.Export(rpt.Document, tmp, "1-10000");
byte[] pdf = File.ReadAllBytes(tmp);
File.Delete(tmp);

并从MemoryStream数组构建pdf或从tmp文件添加附件。

使用Memory Stream生成PDF文件as system.net.mail.attachment

1 个答案: